DEVICE FOR CONTROL OF AC ELECTRIC DRIVE Russian patent published in 2012 - IPC H02P25/02 H02P27/04 H02P27/06 

FIELD: electricity.

SUBSTANCE: according to the method for control of AC electric drive during generation of the inverter thyristors control signals one uses relay motor phase voltage regulators, sinusoidal signals for the motor phases voltage setting supplied to the first inputs of the relay regulators of the corresponding motor phases voltage. Supplied to the second outputs of the relay motor voltage regulators are measured instantaneous values of the corresponding motor phases voltage, the control logical signals from the outputs of the relay motor phase voltage regulators supplied to the control outputs of thyristors of the corresponding inverter anode group phases as well as to the inputs of the logical NOT elements of the corresponding phases. Control logical signals from the logical NOT elements outputs supplied to the control inputs of thyristors of the corresponding inverter cathode group phases.

EFFECT: simplification of the system for control of the AC electric drive based on a standalone current inverter with fully controlled power switches.

3 dwg